Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 403 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c
new file mode 100644
index 000000000..06f4203fb
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c
@@ -0,0 +1,403 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Copyright (C) 2012-2014, 2018-2022 Intel Corporation
+ * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
+ * Copyright (C) 2017 Intel Deutschland GmbH
+ */
+#include <net/mac80211.h>
+#include "fw-api.h"
+#include "mvm.h"
+
+/* Maps the driver specific channel width definition to the fw values */
+u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef)
+{
+	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_20_NOHT:
+	case NL80211_CHAN_WIDTH_20:
+		return IWL_PHY_CHANNEL_MODE20;
+	case NL80211_CHAN_WIDTH_40:
+		return IWL_PHY_CHANNEL_MODE40;
+	case NL80211_CHAN_WIDTH_80:
+		return IWL_PHY_CHANNEL_MODE80;
+	case NL80211_CHAN_WIDTH_160:
+		return IWL_PHY_CHANNEL_MODE160;
+	case NL80211_CHAN_WIDTH_320:
+		return IWL_PHY_CHANNEL_MODE320;
+	default:
+		WARN(1, "Invalid channel width=%u", chandef->width);
+		return IWL_PHY_CHANNEL_MODE20;
+	}
+}
+
+/*
+ * Maps the driver specific control channel position (relative to the center
+ * freq) definitions to the the fw values
+ */
+u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef)
+{
+	int offs = chandef->chan->center_freq - chandef->center_freq1;
+	int abs_offs = abs(offs);
+	u8 ret;
+
+	if (offs == 0) {
+		/*
+		 * The FW is expected to check the control channel position only
+		 * when in HT/VHT and the channel width is not 20MHz. Return
+		 * this value as the default one.
+		 */
+		return 0;
+	}
+
+	/* this results in a value 0-7, i.e. fitting into 0b0111 */
+	ret = (abs_offs - 10) / 20;
+	/*
+	 * But we need the value to be in 0b1011 because 0b0100 is
+	 * IWL_PHY_CTRL_POS_ABOVE, so shift bit 2 up to land in
+	 * IWL_PHY_CTRL_POS_OFFS_EXT (0b1000)
+	 */
+	ret = (ret & IWL_PHY_CTRL_POS_OFFS_MSK) |
+	      ((ret & BIT(2)) << 1);
+	/* and add the above bit */
+	ret |= (offs > 0) * IWL_PHY_CTRL_POS_ABOVE;
+
+	return ret;
+}
+
+/*
+ * Construct the generic fields of the PHY context command
+ */
+static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt,
+				     struct iwl_phy_context_cmd *cmd,
+				     u32 action)
+{
+	cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
+							    ctxt->color));
+	cmd->action = cpu_to_le32(action);
+}
+
+static void iwl_mvm_phy_ctxt_set_rxchain(struct iwl_mvm *mvm,
+					 struct iwl_mvm_phy_ctxt *ctxt,
+					 __le32 *rxchain_info,
+					 u8 chains_static,
+					 u8 chains_dynamic)
+{
+	u8 active_cnt, idle_cnt;
+
+	/* Set rx the chains */
+	idle_cnt = chains_static;
+	active_cnt = chains_dynamic;
+
+	/* In scenarios where we only ever use a single-stream rates,
+	 * i.e. legacy 11b/g/a associations, single-stream APs or even
+	 * static SMPS, enable both chains to get diversity, improving
+	 * the case where we're far enough from the AP that attenuation
+	 * between the two antennas is sufficiently different to impact
+	 * performance.
+	 */
+	if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm, ctxt)) {
+		idle_cnt = 2;
+		active_cnt = 2;
+	}
+
+	/*
+	 * If the firmware requested it, then we know that it supports
+	 * getting zero for the values to indicate "use one, but pick
+	 * which one yourself", which means it can dynamically pick one
+	 * that e.g. has better RSSI.
+	 */
+	if (mvm->fw_static_smps_request && active_cnt == 1 && idle_cnt == 1) {
+		idle_cnt = 0;
+		active_cnt = 0;
+	}
+
+	*rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) <<
+					PHY_RX_CHAIN_VALID_POS);
+	*rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
+	*rxchain_info |= cpu_to_le32(active_cnt <<
+					 PHY_RX_CHAIN_MIMO_CNT_POS);
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	if (unlikely(mvm->dbgfs_rx_phyinfo))
+		*rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
+#endif
+}
+
+/*
+ * Add the phy configuration to the PHY context command
+ */
+static void iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm *mvm,
+					 struct iwl_mvm_phy_ctxt *ctxt,
+					 struct iwl_phy_context_cmd_v1 *cmd,
+					 struct cfg80211_chan_def *chandef,
+					 u8 chains_static, u8 chains_dynamic)
+{
+	struct iwl_phy_context_cmd_tail *tail =
+		iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci);
+
+	/* Set the channel info data */
+	iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);
+
+	iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &tail->rxchain_info,
+				     chains_static, chains_dynamic);
+
+	tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
+}
+
+/*
+ * Add the phy configuration to the PHY context command
+ */
+static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
+				      struct iwl_mvm_phy_ctxt *ctxt,
+				      struct iwl_phy_context_cmd *cmd,
+				      struct cfg80211_chan_def *chandef,
+				      u8 chains_static, u8 chains_dynamic)
+{
+	cmd->lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm->fw,
+						       chandef->chan->band));
+
+	/* Set the channel info data */
+	iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);
+
+	/* we only support RLC command version 2 */
+	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) < 2)
+		iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd->rxchain_info,
+					     chains_static, chains_dynamic);
+}
+
+static int iwl_mvm_phy_send_rlc(struct iwl_mvm *mvm,
+				struct iwl_mvm_phy_ctxt *ctxt,
+				u8 chains_static, u8 chains_dynamic)
+{
+	struct iwl_rlc_config_cmd cmd = {
+		.phy_id = cpu_to_le32(ctxt->id),
+	};
+
+	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) < 2)
+		return 0;
+
+	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_DRIVER_FORCE !=
+		     PHY_RX_CHAIN_DRIVER_FORCE_MSK);
+	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_VALID !=
+		     PHY_RX_CHAIN_VALID_MSK);
+	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE !=
+		     PHY_RX_CHAIN_FORCE_SEL_MSK);
+	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE_MIMO !=
+		     PHY_RX_CHAIN_FORCE_MIMO_SEL_MSK);
+	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_COUNT != PHY_RX_CHAIN_CNT_MSK);
+	BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_MIMO_COUNT !=
+		     PHY_RX_CHAIN_MIMO_CNT_MSK);
+
+	iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd.rlc.rx_chain_info,
+				     chains_static, chains_dynamic);
+
+	return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD,
+						    DATA_PATH_GROUP, 2),
+				    0, sizeof(cmd), &cmd);
+}
+
+/*
+ * Send a command to apply the current phy configuration. The command is send
+ * only if something in the configuration changed: in case that this is the
+ * first time that the phy configuration is applied or in case that the phy
+ * configuration changed from the previous apply.
+ */
+static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
+				  struct iwl_mvm_phy_ctxt *ctxt,
+				  struct cfg80211_chan_def *chandef,
+				  u8 chains_static, u8 chains_dynamic,
+				  u32 action)
+{
+	int ret;
+	int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1);
+
+	if (ver == 3 || ver == 4) {
+		struct iwl_phy_context_cmd cmd = {};
+
+		/* Set the command header fields */
+		iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action);
+
+		/* Set the command data */
+		iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef,
+					  chains_static,
+					  chains_dynamic);
+
+		ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
+					   0, sizeof(cmd), &cmd);
+	} else if (ver < 3) {
+		struct iwl_phy_context_cmd_v1 cmd = {};
+		u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm);
+
+		/* Set the command header fields */
+		iwl_mvm_phy_ctxt_cmd_hdr(ctxt,
+					 (struct iwl_phy_context_cmd *)&cmd,
+					 action);
+
+		/* Set the command data */
+		iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef,
+					     chains_static,
+					     chains_dynamic);
+		ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
+					   0, len, &cmd);
+	} else {
+		IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver);
+		return -EOPNOTSUPP;
+	}
+
+
+	if (ret) {
+		IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
+		return ret;
+	}
+
+	if (action != FW_CTXT_ACTION_REMOVE)
+		return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
+					    chains_dynamic);
+
+	return 0;
+}
+
+/*
+ * Send a command to add a PHY context based on the current HW configuration.
+ */
+int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
+			 struct cfg80211_chan_def *chandef,
+			 u8 chains_static, u8 chains_dynamic)
+{
+	WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
+		ctxt->ref);
+	lockdep_assert_held(&mvm->mutex);
+
+	ctxt->channel = chandef->chan;
+	ctxt->width = chandef->width;
+	ctxt->center_freq1 = chandef->center_freq1;
+
+	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
+				      chains_static, chains_dynamic,
+				      FW_CTXT_ACTION_ADD);
+}
+
+/*
+ * Update the number of references to the given PHY context. This is valid only
+ * in case the PHY context was already created, i.e., its reference count > 0.
+ */
+void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
+{
+	lockdep_assert_held(&mvm->mutex);
+	ctxt->ref++;
+}
+
+/*
+ * Send a command to modify the PHY context based on the current HW
+ * configuration. Note that the function does not check that the configuration
+ * changed.
+ */
+int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
+			     struct cfg80211_chan_def *chandef,
+			     u8 chains_static, u8 chains_dynamic)
+{
+	enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY;
+
+	lockdep_assert_held(&mvm->mutex);
+
+	if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) >= 2 &&
+	    ctxt->channel == chandef->chan &&
+	    ctxt->width == chandef->width &&
+	    ctxt->center_freq1 == chandef->center_freq1)
+		return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
+					    chains_dynamic);
+
+	if (fw_has_capa(&mvm->fw->ucode_capa,
+			IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) &&
+	    ctxt->channel->band != chandef->chan->band) {
+		int ret;
+
+		/* ... remove it here ...*/
+		ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
+					     chains_static, chains_dynamic,
+					     FW_CTXT_ACTION_REMOVE);
+		if (ret)
+			return ret;
+
+		/* ... and proceed to add it again */
+		action = FW_CTXT_ACTION_ADD;
+	}
+
+	ctxt->channel = chandef->chan;
+	ctxt->width = chandef->width;
+	ctxt->center_freq1 = chandef->center_freq1;
+
+	return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
+				      chains_static, chains_dynamic,
+				      action);
+}
+
+void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
+{
+	lockdep_assert_held(&mvm->mutex);
+
+	if (WARN_ON_ONCE(!ctxt))
+		return;
+
+	ctxt->ref--;
+
+	/*
+	 * Move unused phy's to a default channel. When the phy is moved the,
+	 * fw will cleanup immediate quiet bit if it was previously set,
+	 * otherwise we might not be able to reuse this phy.
+	 */
+	if (ctxt->ref == 0) {
+		struct ieee80211_channel *chan = NULL;
+		struct cfg80211_chan_def chandef;
+		struct ieee80211_supported_band *sband;
+		enum nl80211_band band;
+		int channel;
+
+		for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
+			sband = mvm->hw->wiphy->bands[band];
+
+			if (!sband)
+				continue;
+
+			for (channel = 0; channel < sband->n_channels; channel++)
+				if (!(sband->channels[channel].flags &
+						IEEE80211_CHAN_DISABLED)) {
+					chan = &sband->channels[channel];
+					break;
+				}
+
+			if (chan)
+				break;
+		}
+
+		if (WARN_ON(!chan))
+			return;
+
+		cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT);
+		iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1);
+	}
+}
+
+static void iwl_mvm_binding_iterator(void *_data, u8 *mac,
+				     struct ieee80211_vif *vif)
+{
+	unsigned long *data = _data;
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+
+	if (!mvmvif->phy_ctxt)
+		return;
+
+	if (vif->type == NL80211_IFTYPE_STATION ||
+	    vif->type == NL80211_IFTYPE_AP)
+		__set_bit(mvmvif->phy_ctxt->id, data);
+}
+
+int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm)
+{
+	unsigned long phy_ctxt_counter = 0;
+
+	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
+						   IEEE80211_IFACE_ITER_NORMAL,
+						   iwl_mvm_binding_iterator,
+						   &phy_ctxt_counter);
+
+	return hweight8(phy_ctxt_counter);
+}